Steel Beams in garage, wrap with gyp?

[Yankee]

Attached garage, when requiring gyp protection of framing members due to living space above, do you require steel beans to also be wrapped?

 

[ICE]

Yes and probably several layers.

 

[Yankee]

Yes and probably several layers.

Code calls for one 5/8" type X on structural members supporting space above. How do you get several layers?

 

[ICE]

Code calls for one 5/8" type X on structural members supporting space above. How do you get several layers?

I ask for it.

 

[fatboy]

Yes, structural members must be protected, one layer 5/8" Type X here.

 

[mark handler]

Some departments are still requiring one hour separation/protection in garages.

One layer of 1/2" or 5/8" does not provide that

 

[Rider Rick]

The city I worked for required 5/8" type X on the bottom of the beam and 1/2" on the sides.

 

[Yankee]

Some departments are still requiring one hour separation/protection in garages.One layer of 1/2" or 5/8" does not provide that

Was it called out in code as one hour separation, , , ever?

 

[Yankee]

I ask for it.

I'm sure you say "please" also : )

 

[mark handler]

Was it called out in code as one hour separation, , , ever?

Yes under the old [1997] UBC, minimum 5/8-inch Type X gypsum board on walls and two layers on lid

 

[fatboy]

Really? I don't recollect the two layers on lids. Was that a CA amendment to the UBC? I don't have my 97 UBC at home........

 

[mark handler]

Really? I don't recollect the two layers on lids. Was that a CA amendment to the UBC? I don't have my 97 UBC at home........

As I remember it, you needed a one hour separation between between Group R, Division 3 and Group U. there was an exception that allowed the wall to have the 5/8" gyp to be applied to only to the garage side wall. But one layer on a horizontal plane does not provide one hour, thus you needed two layers on the horizontal plane [lid].

 

[Rider Rick]

Mark,

Was it two layers of 5/8" Type X on the lid?

 

[Yankee]

I thought fire ratings were only applicable to assemblies? Wouldn't the rest of the floor structure need to be called out as part of the assembly to have a rated floor system of 1 hour?

 

[mark handler]

there are one hour floor ceiling assemblies

http://www.thebuildingcodeforum.com/forum/fire-links/7301-ga-600-2009-fire-resistance-design-manual.html

GA FILE NO. FC 5406

 

[mark handler]

Mark,Was it two layers of 5/8" Type X on the lid?

yes, when habitable space was above

 

[mark handler]

One hour unrestrained beam

GA FILE NO. BM 1137 PROPRIETARY

http://www.thebuildingcodeforum.com/forum/fire-links/7301-ga-600-2009-fire-resistance-design-manual.html

But the current RESIDENTIAL CODE TABLE R302.6 allows for

Not less than 1/2-inch gypsum board or equivalent

 

[Yankee]

there are one hour floor ceiling assemblieshttp://www.thebuildingcodeforum.com/forum/fire-links/7301-ga-600-2009-fire-resistance-design-manual.html

GA FILE NO. FC 5406

. . . . yes, I know, thanks for the link. Did the previous code call for a "one hour floor/ceiling assembly", or for "two layers of gyp"?

 

[mark handler]

. . . . yes, I know, thanks for the link. Did the previous code call for a "one hour floor/ceiling assembly", or for "two layers of gyp"?

As I posted before It called for a one hour separation, you cannot achieve that with one layer.

 

[pete_t]

Only one layer of 5/8 was required on the garage side.

2001 CBC

302.4 Fire Ratings for Occupancy Separations. Occupancy

separations shall be provided between the various groups and di

visions of occupancies as set forth in Table 3-B. For required sep

aration of specific uses in Group I, Division 1 hospitals and

nursing homes, see Table 3-C. See also Section 504.6.1.

Exceptions:

3. In the one-hour occupancy separation between Group R, Divi-

sions [for SFM] 2.1, 2.2, 2.2.1 and 3 and Group U Occupancies, the

separation may be limited to the installation of materials approved for

one -hour fire-resistive construction on the garage side and a self-clos

ing, tightfitting solid-wood door 1⅜ inches (35 mm) in thickness, or

a self-closing, tight fining door having a fire-protection rating of not

less than 20 minutes when rested in accordance with Part II of UBC

Standard 7-2, which is a part of this code, is permitted in lieu of a one-

hour fire assembly. Fire dampers need not be installed in air ducts

passing th rough the wall, floor or ceiling separating a Group R, Divi

sions [sFM] 2.1, 2.2, 2.2.1 and 3 Occupancy from a Group U Occu-

pancy, provided such ducts within the Group U Occupancy are

constructed of steel having a thickness not less than 0.019 inch (0.48

mm) (No. 26 galvanized sheet gage) and have no openings into the

Group U Occupancy.

 

[mark handler]

Only one layer of 5/8 was required on the garage side. 2001 CBC

302.4 See also Section 504.6.1.

Exceptions:

3. In the one-hour occupancy separation between Group R, Divi-

sions [for SFM] 2.1, 2.2, 2.2.1 and 3 and Group U Occupancies, the

separation may be limited to the installation of materials approved for

one -hour fire-resistive construction on the garage side

2001 CBC based on the 1997 UBC

And You cannot achieve a one hour horizontal separation with one layer

Unless you can show an approved assembly that allows one layer, I do not know of one

It's a moot issues because the code now allows 1/2", done deal.

 

[mark handler]

U.S. Home Structure Fires

U.S. Fire Administration’s National Fire Incident Reporting System show that in 2006-2010:

Cooking equipment was the leading cause of home structure fires and home fire injuries.

Smoking was the leading cause of civilian home fire deaths.

Heating equipment was the second most common cause of home fire fatalities.

less than 5% of all fires in one- and two-family residences originated in the garage.

Home fires:

Cooking equipment

Heating equipment

Intentional

Electrical distribution and lighting equipment

Smoking materials

Clothes dryer or washer

garage

with less than 5% of all fires in one- and two-family residences originated in the garage, Money is better spent elsewhere

 

[Mr. Inspector]

doen't CA have a residental code or is the CBC for everything?

 

[Daddy-0-]

We require 5/8 underside and 1/2 sidewalls but only if garage has living space above.